{"product_id":"1746-nr4-allen-bradley-slc-500-resistance-input-module","title":"1746-NR4 Allen-Bradley SLC 500 Resistance Input Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1746-NR4\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1746-NR4\u003c\/strong\u003e Resistance Input Module, operates as a dedicated hardware component for RTD and resistance signal acquisition within SLC 500 controller systems. The module converts analog resistance values into digital data for PLC processing.\u003c\/p\u003e\n\u003ch3\u003eModel Identification\u003c\/h3\u003e\n\u003cp\u003eThe 1746-NR4 is an SLC 500 analog input module designed for RTD and resistance measurement applications. The available catalog variations include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1746-NR4 standard catalog number\u003c\/li\u003e\n\u003cli\u003e1746-NR4\/A hardware revision\u003c\/li\u003e\n\u003cli\u003e1746-NR4\/B hardware revision\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1746-NR4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRTD \/ Resistance Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSLC 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e24.5 x 16.5 x 5.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot specified in provided data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W max (0.3 W at 5 VDC, 1.2 W at 24 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e4 points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eRTD \/ Resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Category\u003c\/td\u003e\n\u003ctd\u003eAnalog Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003e2.62 - 65.5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Location\u003c\/td\u003e\n\u003ctd\u003eAny slot except Slot 0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control Integration Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1746-NR4 operates within the SLC 500 backplane architecture and transfers converted analog measurement data to the processor through the chassis bus. The module supports I\/O density scaling by providing four analog resistance input channels in a single slot.\u003c\/p\u003e\n\u003cp\u003eThe module backplane interface manages communication between the analog input circuitry and the SLC processor. Proper firmware compatibility between the processor and I\/O configuration is required when integrating replacement modules into existing control systems.\u003c\/p\u003e\n\u003ch3\u003eInstallation and Wiring Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the module in an SLC 500 chassis slot other than Slot 0.\u003c\/li\u003e\n\u003cli\u003eConnect RTD or resistance sensors according to the terminal wiring configuration defined for the module.\u003c\/li\u003e\n\u003cli\u003eSeparate analog signal wiring from high voltage power conductors to reduce electrical interference.\u003c\/li\u003e\n\u003cli\u003eUse shielded instrumentation cable where required by the installation environment.\u003c\/li\u003e\n\u003cli\u003eConnect cable shields according to the system grounding practice.\u003c\/li\u003e\n\u003cli\u003eVerify module power loading before installation into a configured chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1746-NR4 RTD \/ Resistance Input Module\u003c\/li\u003e\n\u003cli\u003e1 x Protective industrial packaging\u003c\/li\u003e\n\u003cli\u003eDocumentation availability depends on supply configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the SLC 500 chassis power capacity before adding the module.\u003c\/li\u003e\n\u003cli\u003eRemove chassis power before inserting or removing the module.\u003c\/li\u003e\n\u003cli\u003eVerify terminal wiring polarity and sensor type before startup.\u003c\/li\u003e\n\u003cli\u003eCheck backplane current loading when multiple analog modules are installed.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between analog input wiring and switching output circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat type of signals does the 1746-NR4 accept?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module accepts RTD and resistance input signals and converts measured resistance values into PLC-readable analog data.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow many input channels are available on the 1746-NR4?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module provides 4 analog input points for RTD and resistance measurement applications within an SLC 500 chassis.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCan the 1746-NR4 be installed in Slot 0?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo. The module can be installed in any SLC 500 chassis slot except Slot 0, which is reserved for the processor module.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat is the backplane current requirement?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module requires 50 mA backplane current according to the provided technical specification.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat is the maximum power consumption of this module?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe maximum power consumption is 1.5 W, consisting of 0.3 W from 5 VDC and 1.2 W from 24 VDC sources.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDoes the module communicate through EtherNet\/IP or DeviceNet?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo. The 1746-NR4 communicates through the SLC 500 chassis backplane connection to the installed processor.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat installation precautions are required for analog wiring?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAnalog sensor wiring should be separated from power conductors and installed using appropriate grounding and shielding practices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eIs hot insertion supported for the 1746-NR4?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module should be installed or removed with chassis power removed unless the specific SLC 500 configuration documentation permits otherwise.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066407342253,"sku":"1746-NR4","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1746-NR4_1-2.jpg?v=1785901817","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1746-nr4-allen-bradley-slc-500-resistance-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}